Depolarizer for galvanic cells.



UNITED STATES. PAT Prion.

PHILIPP BURGER], F BERLIN, GERMANY.

DEPOLARIlIZERFOR GALVANIC CELLS.

No Drawing. 7

f To all whom it may concern:

Beit known that I, PHILIPP BURGER, a subject of the German Emperor, and resident at 9 Claudiusstrasse, Berlin, Germany,

have invented certain new and useful Improvements in Depolarizer's for Galvanic Cells, of which the following is a specification.

The present invention relates to a gal- 10 vanic cell, in which the carbon electrode is surrounded by a mixture of brownstone and the like. 'According to the present inventlon chemically pure carbon (in the form of soot is used in place of graphite. Preferably a etylenc soot is used, which may, for instance, be obtained by decomposing the acetylene gas by means of an electric spark; the acetylene I amount, whereby the life of the galvanic cell is correspondingly ;.'iengthened. The use of soot hasfurther the considerable advantage,'that it is possible .to make the galvanic cells of a uniform character, as the artificially or chemically produced soot will Patented J an. 5, 1915.

Application filed July 2, 1913. Serial No. 777,104.

also be absolutely uniform, contrary to the graphite which is of a very irregular composition. Lastly it is possible to mix the chemically pure carbon more intimately and evenly with the brownstone, as soot is a substance which is extremely finely divided.

. The galvanic cell consists for instance in a known manner of a carbon stick, which is surrounded by a mixture ofl'manganese dioxid and graphite, which mixture is moistened with sal-ammoniac water. The whole is placed in a zinc tank,--whichis filled with the exciting substance.

According to the present invention chemically pure carbon or soot is substituted in such cell for the graphite.

I claim:

1. A depolarizer for galvanic cells, comprising a mixture of manganese dioxid and finally divided chemically pure carbon in the form of soot.

,depolarizer for galvanic cells, com pr sing a mixturevof manganese dioxid and finely divided chemically pure carbon in the form of acetylene soot.

In testimony whereof I/have hereunto signed my name this 19th day of June 1913, y

in the presence of two subscribing witnesses.

PHILIPP BURGER. Witnesses:

HENRY HAsPER, WOLDEMAR HAur'r. 

